diff --git a/core/build.sbt b/core/build.sbt
index 43d4a7e..c35e40c 100644
--- a/core/build.sbt
+++ b/core/build.sbt
@@ -4,7 +4,7 @@ description :=
   "Core Dispatch module wrapping async-http-client"
 
 libraryDependencies +=
-  "org.asynchttpclient" % "async-http-client" % "3.0.0"
+  "org.asynchttpclient" % "async-http-client" % "3.0.1"
 
 enablePlugins(BuildInfoPlugin)
 
diff --git a/core/src/main/scala/requests.scala b/core/src/main/scala/requests.scala
index 58a86c6..ed9a261 100644
--- a/core/src/main/scala/requests.scala
+++ b/core/src/main/scala/requests.scala
@@ -484,6 +484,14 @@ trait RequestBuilderVerbs extends RequestVerbs {
     subject.underlying(_.addOrReplaceCookie(cookie))
   }
 
+  /**
+   * Add a cookie based on its name, if it does not exist yet. Cookies that
+   * are already set will be ignored.
+   */
+  def addCookieIfUnset(cookie: Cookie) = {
+    subject.underlying(_.addCookieIfUnset(cookie))
+  }
+
   /**
    * Set auth realm
    */